ceph fix the problem caused by outdated 5-min-quickstart

ceph-deploy purge ceph{1,2,3}-test
ceph-deploy purgedata ceph{1,2,3}-test
# need more cleaning than that ... apt/dpkg is retarded
for n in {1..3}; do
    ssh ceph${n}-test "sudo rm -r /var/log/ceph; sudo apt-get remove -y ceph ceph-common librbd1; sudo apt-get autoremove -y"
done